USER INSTRUCTIONS MODEL MCE325 PROGRAMMABLE USER STATION 9350-6464-00 Rev J, 7/2001
PROPRIETARY NOTICE The RTS product information and design disclosed herein were originated by and are the property of Telex Communications, Inc. telex reserves all patent, proprietary design, manufacturing, reproduction, use and sales rights thereto, and to any article disclosed therein, except to the extent rights are expressly granted to others. COPYRIGHT NOTICE Copyright © 1995-2001 by Telex Communications, Inc. All rights reserved.
RETURN SHIPPING INSTRUCTIONS PROCEDURE FOR RETURNS If a repair is necessary, contact the dealer where this unit was purchased. If repair through the dealer is not possible, obtain a RETURN AUTHORIZATION from: Customer Service Department Telex Communications, Inc. Telephone: (877) 863-4169 Fax: (800) 323-0498 DO NOT RETURN ANY EQUIPMENT DIRECTLY TO THE FACTORY WITHOUT FIRST OBTAINING A RETURN AUTHORIZATION.
End-User License Agreement for Telex® Software IMPORTANT - Please read this document carefully before using this product. THIS DOCUMENT STATES THE TERMS AND CONDITIONS UPON WHICH TELEX COMMUNICATIONS, INC. (the “COMPANY”) OFFERS TO LICENSE THE INSTALLED SOFTWARE OR PROGRAM (the “SOFTWARE”) FOR USE WITH THE PRODUCT IN WHICH IT WAS INSTALLED. YOU ARE AGREEING TO BECOME BOUND BY THE TERMS OF THIS AGREEMENT. IF YOU DO NOT AGREE TO THE TERMS OF THIS AGREEMENT, DO NOT USE THIS PRODUCT.
TABLE OF CONTENTS Description & Specifications 1-1 Description . . . . . . . . . . . . . . . . . . . General . . . . . . . . . . . . . . . . . . . Features . . . . . . . . . . . . . . . . . . . Front Panel Features . . . . . . . . . . . . Channel Selector and Operation Buttons Volume Controls . . . . . . . . . . . . . Sidetone Nulling Trimmers . . . . . . . . Connections, Inputs and Outputs . . . . . . Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unswitched Microphone Output External DC Power Source . . Remote Speaker Mute Control. Front Panel Headset Connections Headset Requirements . . . . Headset Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IFB A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Level and Frequency Response Check, Four-Wire Input to Headphone Four-Wire A Input to Left Headphone . . . . . . . . . . . . . . . . Four-Wire B input to Right Headphone. . . . . . . . . . . . . . . . Panel Mic to Channel Test . . . . . . . . . . . . . . . . . . . . . . . . Carbon Mic to Channel Test . . . . . . . . . . . . . . . . . . . . . . . VOX Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iv
S E C T I O N DESCRIPTION & SPECIFICATIONS CHAPTER1 Description General The MCE325 is a four-channel, programmable intercom station. It may be used as a headset station or, with the addition of the MCS325 Modular Speaker, as a speaker station. It may be mounted in a console or equipment rack via optional mounting kits. The MCE325 can be used with either two-wire or four-wire intercom lines, or a combination of both.
Front Panel Features Channel Selector and Operation Buttons These buttons have two modes of operation: standard operating mode and program, or setup, mode. The printing on the face of each button indicates its function in standard operating mode; printing under each button indicates its setup mode function. (See Section 3 for operation and programming instructions.) An LED located above each button provides status information.
Figure 1.1 MCE325 front and rear panel features. Rear Panel Features Intercom Lines Connectors J8 and J9 are parallel-wired for loop-through connection to additional stations. These connectors are used either for two-wire channels 1 and 2 input/output, or four-wire channel A output. (The four-wire channel A input is connected at the auxiliary connector.
be assigned to a four-wire channel. The program assigned to channels is interrupted during talk output. Speaker Output A ¼-inch phone jack is provided for connection of an external speaker (8-ohms minimum impedance). The speaker output is compatible with the MCS325 speaker.
MCE325 Specifications General Bridging Impedance (to line) 10,000 ohms typical Noise Contribution to 200-ohm Line -90 dBu Call Signal Frequency 20 kHz, crystal controlled Talk-off Frequency 24 kHz, crystal controlled Microphone Preamplifier Maximum Voltage Gain 54 dB Frequency Response 100 Hz to 8,000 Hz, ±3 dB Input Impedance 1,000 ohms Limiter Range 30 dB Headphone Amplifier Maximum Voltage Gain 30 dB Frequency Response 100 Hz to 8,000 Hz, ±3 dB Headphone Impedance 50 to 600 ohms Out
Connectors Intercom Line Connector XLR type, 3-pin (male-female loop through on two-wire channel 1 and 2, or four-wire channel A; Female only on two-wire channel 3 and 4, or four-wire channel B Dynamic Mic XLR type, 6-pin female Carbon Mic ¼-inch phone jack, 3-circuit Auxiliary Connector 25-pin, female, D-Sub Program Inputs ¼-inch phone jack, 3-circuit Speaker Output ¼-inch phone jack, 3-circuit Panel Mic ¼-inch phone jack, metal busing, 3-circuit MCS325 Specifications The MCS325 is designed f
Figure 1.3 Standard four-channel, two-wire configuration. Figure 1.4 A four-channel, two-wire configuration with two channels used for IFB’s. Figure 1.5 Configuration for one or two two-wire channels and one four-wire channel.
1-8 Figure 1.6 Standard two-channel, four wire configuration. Figure 1.7 Multiple interconnected stations in four-channel, two-wire configuration with two channels used for IFB’s.
Figure 1.8 Multiple interconnected stations using one four-wire intercom channel and two two-wire channels for IFB’s. Figure 1.9 A four-channel, two-wire configuration with two channels used for IFB’s (shown with TELCO interface).
Figure 1.10 Configuration for an ENG truck using one four-wire intercom channel and two two-wire IFB’s.
Figure 1.11 MCE325 button configurations.
1-12 MCE325 User Instructions
S E C T I O N INSTALLATION CHAPTER2 Internal Programming and Adjustments WARNING Hazardous voltages exist inside this equipment. Disconnect the AC line cord before opening the equipment or attempting any internal programming or adjusting. General Prior to installing the MCE325, it may be necessary to change some of the internal programming to suit your particular application. Table 2.1 and Table 2.2 list the functions for the DIP switches and jumpers which are used for internal programming.
Figure 2.1 Top cover removal. Intercom Line-Channel Configurations (DS1-DS3, J6, J7, J19 & J20) The four channels of the MCE325 may be assigned to intercom lines in a variety of ways. Channel assignment is determined by the settings of DIP switches DS1 through DS3 and jumpers J6, J7, J19, and J20. There are six possible intercom line configurations. These are listed in Table 2.3 together with the proper DIP switch and jumper settings for each. Table 2.1 DIP switch functions and default settings.
2 When a two-wire line is connected to channel one and a four-wire line is connected to channel B. For all other intercom line configurations that use two-wire lines, DS3 must be set to the “on” position for four-channel operation. Table 2.2 NOTE Jumper functions and default settings. Jumper Number Jumper Function Default Setting J4 Assigns PROGRAM A input to two-wire CH 3 or four-wire CH B. Not assigned: pins 2 & 3 shorted. Assigned: pins 1 & 2 shorted (IFB to CH 3).
Figure 2.2 2-4 Internal DIP switches, jumpers and level trimmers.
Table 2.3 Internal programming for the various intercom line configurations. DIP SWITCHES JUMPERS DS1 J6 DS2 DS3 J7 J19 J20 Configuration 1: Two 2-wire lines (CH 1& CH 2). (Default configuration.) Off Off Off Pins 2 & 3 shorted Pins 2 & 3 shorted Pins 2 & 3 shorted Pins 2 & 3 shorted Configuration 2: Three or four 2-wire lines (CH 1, CH 2, CH 3, CH 4).
Program Assignment – IFB Option (J4, J5, J16-J18) Jumper J4 assigns PROGRAM A to two-wire CH 3 or four-wire CH B with interrupt during talk (IFB A). Jumper J5 assigns PROGRAM B to CH 4 with interrupt during talk (IFB B). (PROGRAM B is not used in four-wire mode.) Jumpers J16, J17, and J18 assign the mono mix of both program inputs to the left headphone, right headphone, and speaker respectively. Program volume to the headphones and speaker is controlled by the PGM VOL control on the front panel.
Figure 2.3 Mounting configurations.
Electrical Installation AC Power and Fuse The Model MCE325 is pre-wired for either 115 or 230 VAC operation, and the appropriate fuse is already installed. The MCE325 uses a 0.5A Slo-Blo fuse for 115 volt operation, or a 0.25A SloBlo fuse for 230 volt operation. (A fused external DC source may be used instead of AC power if desired. (See “External DC Power Source”.
resistor values. These resistors would normally be installed in the cable connector, but may be placed at any point in the signal path. Recommended values are shown in X. Program Inputs, J14 and J15 The PROGRAM A and B inputs accept line-level (0 dBu nominal), balanced audio. The program inputs are connected using ¼-inch stereo phone plugs. Figure 2.5 SECTION Connectors J14 and J15.
Key outputs – Expanded IFB Option Four logic-type outputs are available at pins 6, 7, 19, and 20 of the auxiliary connector: Table 2.7 Auxiliary connector, J22. PIN # FUNCTION 6 CH 1 or four wire CH A key output 7 CH 3 or four-wire CH B key output 19 CH 2 key output 20 CH 4 key output There are internal pull-up resistors on the CH 3 and CH 4 key outputs. Pressing the CH 3 or CH 4 talk button will result in a logic high to low transition at the corresponding key output.
Separate shielded twisted pair cables: 50 feet (15.24 m). Balanced microphone input: up to 100 feet (30.48 m). External Electret Microphone An external electret microphone may be connected at the auxiliary connector and used in place of a front-panel gooseneck microphone. Connect microphone high/bias to pin 15 and connect microphone low to pin 2. When using an external microphone, do not connect a front-panel gooseneck microphone.
Carbon-microphone headset connector: ¼-inch, tip-ring-sleeve phone jack. Table 2.9 Carbon-microphone headset connector.
S E C T I O N OPERATION CHAPTER3 General The front panel buttons have different functions when the MCE325 is switched from operating mode to setup mode. Legends on the buttons indicate their operating mode functions; legends under the buttons indicate their setup mode functions. All of the front panel buttons were preprogrammed for a certain type of operation. This is the default configuration.
button action can be changed, via the front panel programming, so that the button controls talk only, with listen either always on or always off. Panel Mic/Headset Mic Selection The PANEL MIC button selects either panel microphone (LED on) or headset microphone (LED off). Microphone On/Off NOTE The MIC ON button turns the microphone on (LED on) or off (LED off). The MCE325 can be programmed, via the front panel, so that the microphone will automatically turn on whenever a channel is activated for talk.
turned on to prevent feedback. See “Headphone Sidetone Trimmer Adjustment (R37)” for further details. Sending and Receiving Call Signals To call a channel: 1 Press the CALL button; the CALL LED’s will flash to indicate “call signal ready”. 2 Press and hold the talk button for the channel to be called; the call signal will be transmitted as long as the talk button is held. 3 When a response is received, release the talk button to turn off the call signal.
Channel ID The MCE325 can be programmed so that when someone is talking on an intercom channel, the corresponding listen button LED will flicker as they talk to provide a visual indication of which channel is talking. With the Channel ID submenu selected, press each TALK button to select or deselect Channel ID. The button’s LED will indicate the Selected mode as follows: Short LED blink: Channel ID disabled. (default). Long LED blink: Channel ID enabled.
Long LED blink (50% on, 50% off): Latching disabled. Instant Mic Talk buttons may be individually programmed to automatically activate the microphone when pressed. With the Instant Mic submenu selected, press each talk button one or more times to select the desired type of operation as follows: Short LED blink (90% on, 10% off): Instant mic off (default). Long LED blink (50% on, 50% off): Instant mic on.
3-6 CSI-200 User Instructions
S E C T I O N MAINTENANCE CHAPTER4 Preventive Maintenance Clean the unit and verify its performance periodically. Factory Support Information Factory support information is located on the first page of this manual. Corrective Maintenance WARNING: Hazardous voltages exist inside the MCE325. Attempting diagnosis, repair, or adjustment with the AC line connected could result in serious injury or death. These servicing instructions are for qualified personnel only.
2 The ribbon connector from the front panel board to the main board is attached at both ends with locking connectors. To unlock the connector, pull the outer shell away from the circuit board. Then, pull the ribbon cable out. Cleaning Clean the front panel and case with alcohol or a mild solution of detergent and water, and then wipe off detergent residue with a damp rag. Clean the circuit board (if necessary) with a tetraflouroethane product such as Flux-Off® CZ by Chemtronics®.
4 Measure the ripple. Vripple = 140 mVp-p 5 Measure the regulated DC voltage at U26 pin 2. (There should be no ripple.) VU26-2 = 13.85 ±0.3 VDC 6 Measure the mid-voltage source at U17 pin 7. VU17-7 = 6.93 ±0.3 VDC 7 Measure the +5 V source at the output of U27 pin 2. VU27-2 = 5.0 ±0.3 VDC Initial Configuration 1 Set all internal jumpers and DIP switches as follows: DIP Switches: Set all DIP switches, except DS3, to the default settings listed in Table 2.1. Set DS3 to on.
2 Set the MIC ON button to on. Set all other front panel buttons to off. 3 Check for 13 VDC minimum at the key 1 output. 4 Turn CH 1 TALK on and check for less than 2 VDC at the key 1 output. 5 Repeat steps 3 and 4 for the other channels: CH2 TALK: key 2 out (J22 pin 19) CH3 TALK: key 3 out (J22 pin 7) CH4 TALK: key 4 out (J22 pin 20) 6 Remove the 47 kohm pull-up resistors when finished. USMB (Un-Switched Microphone Balanced) Frequency Response and Level Check 1 Set all front panel buttons to off.
Table 4.2 10 kHz Table 4.3 USMB frequency response and level check. -55 dBu (1.4 mV) –45 dBu (4.35 mV) –25 dBu (43.5 mV) -5.7 ±3 dBu (0.28 – 0.57 VAC) 2.2 ±2 dBu (0.79 – 1.26 VAC) 2.5 ±2dBu (0.83 – 1.32 VAC) Mic to line response; 4-channel, 2-wire mode. INPUT INPUT FREQUENCY LEVEL OUTPUT LEVEL 1 kHz -45 dBu -0.8 ±2 dBu (0.56 – 0.89 VAC) 100 Hz -45 dBu -0.8 ±2 dBu (0.56 – 0.89 VAC) 100 kHz -45 dBu 0.8 ±2 dBu (0.56 – 0.
8 Repeat for channels 2 through 4 by activating the TALK buttons, connecting to the test points and adjusting the potentiometers as indicated in Table 4.4. True Sidetone Adjust 1 Configure the DYN MIC HEADSET jack for stereo mode (See Section 3, “MONO”) 2 Set all front panel buttons to off. 3 Connect 51 ohm load resistors across the left headphone output (J2 pins 3 and 4) and right headphone output (J2 pins 3 and 5). 4 Connect an AC voltmeter across the left headphone output.
Level and Frequency Response Check, Intercom Channel to Speaker 1 Set all front panel buttons to off. Set all volume controls to minimum. 2 Connect an 8 ohm load across the speaker output (J27, tip and ring) 3 Connect an AC voltmeter and an oscilloscope across the speaker output. 4 Connect the signal generator to intercom channel 1, and adjust the generator output to –1 dBu, 1 kHz. 5 Set the SPKR ON and CH 1 TALK buttons to on.
11 Restore jumper J16 to short pins 1 & 2. Program B to Right Headphone 1 Remove the signal from the PROGRAM A input, and connect it to the PROGRAM B input. 2 Measure the level at the right headphone output (J2, 3 & 5). It should be 1.3 dBu ±2 dBu. (Program volume at maximum.) 3 Set the signal generator to 0 dBu, 100 Hz. The right headphone output should be 0.8 dBu ±2 dBu. 4 Set the signal generator to 0 dBu, 10 kHz. The right headphone output should be –3.8 dBu ±2 dBu.
IFB A 1 Move the J4 jumper to short pins 1 and 2 (IFB A assigned to channel 3). 2 Remove the signal from PROGRAM B input, and connect it to the PROGRAM A input. Set the signal generator to 0 dBu, 1 kHz. 3 Check the output level across intercom channel 3. It should be –9.8 dBu ±2 dBu. 4 Turn on the CH 3 TALK and MIC ON buttons. The channel 3 output should drop at least 45 dB from the reference level in step 3. 5 Turn off the CH 3 TALK and MIC ON buttons.
Panel Mic to Channel Test 1 Turn all front panel buttons off. Set all volume controls to minimum. 2 Remove the signal from the Four-Wire B input and reconnect it to the panel mic input (J28 tip and ring, it is easiest to connect to the back of the connector.). 3 Set the signal generator to –25 dBu, 1 kHz. 4 Turn on the CH 1 TALK, MIC ON and PANEL MIC buttons. 5 Check the channel 1 output. It should be –0.9 dBu ±2 dBu. Carbon Mic to Channel Test 1 Turn off the PANEL MIC and MIC ON buttons.
11 Try turning the MIC ON button on. It should not stay on. 12 Adjust signal generator to –5 dBu at 25.680 kHz. 13 Try turning the MIC ON button on and off. It should turn on and off as usual. 14 Adjust signal generator to –5 dBu at 24.480 kHz. 15 Try turning the MIC ON button on. It should not stay on. 16 Remove the signal generator from channel 1. Mic Kill Transmit Test 1 Set all front panel buttons to off. 2 Connect a frequency counter an AC meter to the intercom channel 1 output.
ISO Test 1 Set DIP switch DS3 to off (two-channel, two-wire mode). 2 Set DIP switch DS5 to on (talk muted during ISO). 3 Set all TALK and LISTEN buttons to on. 4 Connect a 100 ohm resistor from the ISO input (J22 pin 12) to circuit common (J22 pin 10). Observe that the MIC ON LED turns on and the channel 1 and 2 TALK buttons turn off. 5 Remove the 100 ohm resistor across the ISO input. 6 Reset DIP switch DS3 to on and DS5 to off. Remote Mic Switch Test 1 Set all buttons to off.
12 Turn on the SPKR ON button. The meter should read –38 dBu or less. Turn off the SPKR ON NOTE button. Noise measurements in the following steps were made using a 400 Hz to 30 kHz bandpass filter with +40 dB of gain. 13 Turn on the MIC ON switch. Measure noise at U1 pin 1 (mic preamp out). The voltmeter should read –26 dBu or less. 14 Turn on the PANEL MIC button. The meter should read –37 dBu or less. 15 Turn all buttons off. 16 Measure noise at U12 pin 7 (program A preamp out).
4-14 CSI-200 User Instructions
S E C T I O N PARTS LISTS CHAPTER5 Packaging Assembly (9000-6464-00) Table 5.1 Reference PD6464 Drawing, Section 6 Item No. Description RTS Part No.
Front Panel Assembly (9020-6261-00) Table 5.3 Reference AS6261 Drawing, Section 6 Item No. Description RTS Part No.
Back Panel Assembly (9020-6262-00) Reference AS6262 Drawing, Section 6 Table 5.4 Item No. Description RTS Part No. 1 PC Board Assy, Main 9030-6245-00 2 Heatsink Assy 9020-6324-00 3 Panel, Rear 9080-6262-00 4 Jack, Phone, 3 conductor, double closed circuit (J27) 2013-0003-00 5 Connector Housing (P23) 57767-203 6 cord, AC Power, Gray 2504-0004-00 7 Strain Relief, Flexible 2509-0025-00 8 Fuse, 0.
Table 5.6 Reference 9027-6245-01 Drawing, Section 6 C104 Capacitor, CM, 0.1µF, 50V 52676113 C105 Capacitor, EL, 100µF, 25V 51821524 C106 Capacitor, EL, 4.7µf, 25V 51821621 C107 Capacitor, EL, 4.7µf, 25V 51821622 C108 Capacitor, EL, 100µF, 25V 51821524 C109 Capacitor, EL, 1000µF, 25V 51821526 C11 Capacitor, CM, 0.1µF, 50V 52676113 C110 Capacitor, CM, 0.1µF, 50V 52676113 C111 Capacitor, CM, 0.
Table 5.6 Reference 9027-6245-01 Drawing, Section 6 C2 Capacitor, EL, 10µF, 50V 51821110 C20 Capacitor, CD, 100pF, 100V 1501R1011L C21 Capacitor, CD, 100pF, 100V 1501R1011L C22 Capacitor, CM, 0.1µF, 50V 52676113 C23 Capacitor, CD, 10pF, 500V 52157502 C24 Capacitor, CM, 0.
Table 5.6 Reference 9027-6245-01 Drawing, Section 6 C61 Capacitor, Mylar, 1nF, 100V 1514R1022L C62 Capacitor, EL, 10µF, 50V 51821110 C63 Capacitor, CD, 100pF, 100V 1501R1011L C64 Capacitor, Mylar, 1nF, 100V 1514R1022L C65 Capacitor, CM, 0.
Table 5.
Table 5.6 Reference 9027-6245-01 Drawing, Section 6 Q4 Transistor, 2N5210 1602521000 Q5 Transistor, 2N5210 1602521000 R1 Resistor, CF, 1K Ohm, 5%, 1/8W 52154060 R10 Resistor, MF, 3.01K Ohm, 1%, 1/8W 54034301 R100 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028 R101 Resistor, CF, 10K Ohm, 5%, 1/8W 52154036 R104 Trimpot, 10K Ohm, Linear 1409006000 R105 Resistor, MF, 60.4K Ohm, 1%, 1/8W 54035604 R106 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200 R107 Resistor, MF, 60.
Table 5.
Table 5.6 Reference 9027-6245-01 Drawing, Section 6 R267 Resistor, MF, 201 Ohm, 1%, 1/8W 54032301 R268 Resistor, CF, 200 Ohm, 5%, 1/8W 52154077 R269 Resistor, CF, 10K Ohm, 5%, 1/8W 52154036 R27 Resistor, CF, 200 Ohm, 5%, 1/8W 52154077 R28 Resistor, CF, 22K Ohm, 5%, 1/8W 52154010 R29 Resistor, CF, 5.1M Ohm, 5%, 1/8W 52154698 R3 Resistor, CF, 100 Ohm, 5%, 1/8W 52154084 R30 Resistor, CF, 100K Ohm, 5% 1/8W 52154012 R31 Resistor, CF, 5.
Table 5.6 Reference 9027-6245-01 Drawing, Section 6 R67 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028 R68 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028 R69 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028 R7 Resistor, MF, 301 Ohm, 1%, 1/8W 54034150 R70 Resistor, CF, 10K Ohm, 5%, 1/8W 52154036 R73 Trimpot, 10K Ohm, Linear 1409006000 R74 Resistor, MF, 60.4K Ohm, 1%, 1/8W 54035604 R75 Resistor, MF, 20K Ohm, 1%, 1/8W 54035200 R76 Resistor, MF, 60.
Table 5.
PC Board Assembly, Front Panel (9030-6246-00) Table 5.7 Ref No. R1-R3 DS9 Reference AS6246 Drawing, Section 6 Description RTS Part No.
5-14 CSI-200 User Instructions
S E C T I O N DIAGRAMS CHAPTER6 6-1
6-2 CSI-200 User Instructions
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5 4 3 2 1 REVISIONS LOC REV DESCRIPTION A FRONT PANEL +4.5V + XX 6 10 YY 5 7 8 9 22K C21 D16 1N914 NE5532 8 7 6 CALL 2 (SHT3,5D) 301 1% C29 8 4 C23 10pF 20.0K 1% D6 1N4004 D7 1N4004 R66 LISTEN BUFFER CH.2 R77 TL072 R69 C6 1nF MONO 22K 6 6 R74 TL072 TALK BUFFER CH.2 R70 10K C31 + R78 C35 + 100 22/50 R79 100K 47/16 R75 7 U6B 5 +7V +7V + 7 U9B NE5532 C34 C22 .1/50 2 22/50 100pF R68 22K 3 C36 20.0K 1% 60.
5 4 3 2 1 +14V U13 4053 16 +7V C61 13 X1 2 Y0 4W-A LSN 14 Y ZZ + (1D) 4W-B HI (SHT1,1C) 8 R126 10/25 C70 1nF LSN2 (SHT1,4C) (SHT3,7D) 2 Y0 1 Y1 5 Z0 3 Z1 11 XX 10 YY 9 ZZ 10.0K 1% 6 1 +14V PGMA (SHT1,5B) U12B 5 10/25 + R132 RP5F 22K 10K (SHT3,2D) RP5E 22K 7 C73 + 7 TL072 4 13 J20 2 R133 10.0K 1% + SPKR DIM (SHT3,2D) 5 Z0 10/25 20.0K 1% R184 22K 10/25 C100 1nF R185 100K C102 HP R (SHT1,8C) 7 C104 .
5 4 3 2 1 U23 1 2 6 7 +5V CALL LIGHT MUX +5V LSN2 (SHT1,4C),(SHT2,5C) Z0 5 LSN3 (SHT1,4B),(SHT2,6C) Z1 3 LSN4 (SHT1,4B),(SHT2,5C) Z 11 XX 10 ZZ 9 9 YY (TO 2D) CALL CTL2 (TO 2D) R199 10K DSW7 1 1 8 7 CALL CTL1 29 30 31 32 33 34 35 36 (2B) DSW5 RP2G 22K RP2H 22K 37 2 +5V +14V PD0/RDI PD1/TDO PD2/MISO PD3/MOSI PD4/SCK PD5/SS TCMP PD7 CLK DI STR EN 5 12 13 14 15 16 17 18 19 PB0 PB1 PB2 PB3 PB4 PB5 PB6 PB7 U24 1 2 6 7 DO 3 .
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